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KAPEX is a full-size bipedal humanoid robot jointly developed by LG Electronics, LG AI Research, and the Korea Institute of Science and Technology (KIST). Announced on October 1, 2025, and publicly unveiled in November 2025, KAPEX is South Korea's flagship entry into the global humanoid robotics race. The name combines "K" (for Korea) with "APEX," symbolizing both reaching the pinnacle of robotics evolution and exploring unknown possibilities.[1][2]
Powered by LG AI Research's EXAONE vision-language model as its cognitive engine, KAPEX is designed to learn independently, adapt to changing environments, perform precise manipulation, and collaborate naturally with humans. Unlike traditional humanoid platforms limited to pre-programmed movements, KAPEX embodies the concept of "Physical AI," where artificial intelligence learns and adapts directly in the physical world to solve real-world problems autonomously.[1][3] KIST Director General Lee Jong-won has stated that "KAPEX will serve as a practical alternative and a new global standard as a Korean AI robot that challenges the US-China-centered market order."[2]
The project is a cornerstone of South Korea's national K-Humanoid Alliance initiative, which allocated approximately $150 million in 2025 for humanoid R&D, infrastructure, and testing, with total government investment projected to reach $770 million by 2030.[4][5] KAPEX targets field demonstrations in 2026 and full commercialization within four years of its announcement.
South Korea has a long history of humanoid robotics research dating back to the early 2000s. The Korea Advanced Institute of Science and Technology (KAIST) began humanoid research in 2002 under Professor Oh Jun-ho, producing the KHR-1 walking prototype in 2003 and the HUBO humanoid in 2005. HUBO gained international recognition when a variant, DRC-HUBO+, won the DARPA Robotics Challenge Finals in 2015, demonstrating that Korean robotics could compete at the highest levels.[6]
KIST, meanwhile, developed its own line of humanoid robots beginning with Mahru in 2005. Mahru was South Korea's first humanoid robot focused on household tasks, equipped with stereo cameras and tactile sensors for performing basic activities such as picking up objects and serving drinks. The robot had 37 motors and could mimic a user's actions in real time.[7] KIST and Samsung Electronics subsequently developed multiple variants: Mahru II, which connected to an external server for networked data processing; Mahru III, a 150 cm, 62 kg prototype completed in 2007; and Ahra, a female counterpart to Mahru. In 2010, KIST unveiled Mahru-Z, the most advanced variant, which could autonomously recognize people, operate home appliances such as microwave ovens and washing machines, and navigate rooms using visual sensors.[8] Although the Mahru series was never commercialized, it established KIST's expertise in humanoid locomotion, manipulation, and domestic service robotics, forming the technical foundation that would later contribute to KAPEX.
KIST currently operates a Center for Humanoid Research within its Artificial Intelligence and Robotics (AIR) Institute. The center conducts research on autonomous manipulation, dual-arm mobile manipulation systems, and robot vision, all of which feed into KIST's collaboration with LG on the KAPEX platform.[9]
LG Electronics entered the robotics market at CES 2017, showcasing concept robots for airports and homes. In 2018, the company introduced the CLOi brand as its unified robotics product line, launching the CLOi PorterBot, ServeBot, and CartBot for commercial settings such as airports, hotels, and supermarkets. The CLOi family expanded over subsequent years to include the CLOi UV-C Bot (autonomous disinfection), CLOi ChefBot (restaurant cooking), CLOi BaristaBot (coffee preparation), and CLOi GuideBot (interactive information and wayfinding).[10]
LG has pursued aggressive investments to build expertise across the robotics value chain. In 2018, the company acquired a 30% controlling stake in Robostar, a South Korean industrial robot manufacturer. In January 2025, LG secured a majority (51%) stake in Bear Robotics, a Silicon Valley-based startup specializing in AI-driven autonomous delivery robots, reportedly valuing the startup at approximately $600 million. LG also holds a 7.36% equity stake in ROBOTIS, a Korean robot component maker.[10][11] Internationally, LG Group Chairman Koo Kwang-mo has directed investments into Figure AI, AgiBot, Dyna Robotics, and Skilled AI.[10]
In January 2026, LG debuted CLOiD, a wheeled home assistant humanoid robot at CES 2026. While CLOiD targets household chore automation using a wheeled base, KAPEX represents LG's parallel investment in fully bipedal humanoid technology intended for more diverse environments and terrains.[12]
KAPEX emerged amid growing concern in South Korea about the country's position in the global humanoid robotics market. By 2025, the United States had established players such as Tesla (Optimus), Figure AI, Boston Dynamics, Agility Robotics, and Apptronik, while Chinese firms including Unitree Robotics and AgiBot were rapidly scaling production. Chinese manufacturers shipped over 13,000 humanoid units in 2025 alone, claiming approximately 87% of global volume.[13] The humanoid robot market is projected to reach $38 billion by 2035, and South Korea risked being left out of this transformative sector despite its strong industrial robotics base.[1]
On April 10, 2025, South Korea's Ministry of Trade, Industry and Energy (MOTIE) formally launched the K-Humanoid Alliance at The Plaza Hotel in Seoul, with Minister Ahn Duk-geun presiding. The alliance brings together over 40 organizations, including Rainbow Robotics, Doosan Robotics, HD Hyundai Robotics, Samsung SDI, SK On, LG Energy Solution, LG Electronics, KAIST, Seoul National University, and Korea University. The government pledged approximately $770 million in total investment by 2030, with $150 million allocated for the inaugural year of 2025.[4][5]
The K-Humanoid Alliance set ambitious technical targets: by 2028, member organizations aim to develop humanoid robots weighing under 60 kg, featuring 50 or more joints, capable of lifting 20 kg payloads, and moving at speeds exceeding 2.5 meters per second. A centralized foundation AI model for humanoid robots is planned for completion by 2028, and mass production of at least 1,000 robots annually is targeted for 2029.[4][5] KAPEX serves as one of the flagship projects within this national strategy.
KIST announced on October 1, 2025, that it had co-developed the next-generation Korean humanoid robot KAPEX with LG Electronics and LG AI Research.[2] Each partner contributed distinct capabilities to the project. KIST provided foundational humanoid locomotion technology, drawing on two decades of humanoid research through the Mahru series and its Center for Humanoid Research. LG Electronics contributed productization expertise, mass-production capacity, and global business experience. LG AI Research developed the EXAONE vision-language model that serves as KAPEX's cognitive engine.[1][2]
Within LG Electronics, the robotics effort is organized under a dedicated robotics platform team in the Home Solution Business Division. LG also established the HS Robotics Lab within its Home Appliance Solution Company to develop core robotic technologies and strengthen product competitiveness.[14] The KAPEX project benefits from LG's broader "One LG" strategy, which coordinates multiple LG Group affiliates to provide integrated robotics subsystems.
The partners unveiled initial results in November 2025, with demonstrations focusing on bipedal mobility and hand manipulation capabilities. Field demonstrations targeting factories, logistics centers, and public environments are planned for 2026, with full commercialization anticipated within four years of the announcement.[1][2]
KAPEX is built around the concept of "Physical AI," a term describing AI systems that interact with, learn from, and act upon the physical world. Rather than relying solely on pre-programmed instructions, KAPEX is designed as an "intelligent companion" that grows through experience.[1][3] The robot can perceive complex environments, make autonomous decisions, and adapt its behavior based on new situations. This approach positions KAPEX as a platform for continuous learning rather than a static machine with fixed capabilities.
LG AI Research Co-President Lim Woo-hyung has articulated the company's philosophy: "The AI that LG pursues is not about competing over how intelligent it is, but about creating a partner that helps people and solves problems in the real world."[3]
At the core of KAPEX's intelligence is the EXAONE family of AI models developed by LG AI Research. The most relevant model for KAPEX is EXAONE 4.5, a vision-language model (VLM) announced at Mobile World Congress 2026 in Barcelona. EXAONE 4.5 can process both text and images simultaneously, enabling KAPEX to interpret visual scenes, read labels, reason about spatial relationships, and understand human instructions in context.[3][15]
Key technical details of the EXAONE ecosystem include:
| Model | Parameters | Architecture | Key features |
|---|---|---|---|
| EXAONE 4.0 | 32B and 1.2B variants | Hybrid attention (global + sliding window) | 128K token context; trained on 14 trillion tokens |
| K-EXAONE | 236B total (23B active) | Mixture-of-Experts | 70% memory reduction; 150K-word tokenizer; multi-token prediction |
| EXAONE 4.5 | 33B | Hybrid Attention with multi-token prediction | Vision-language model; open-weight release planned H1 2026 |
EXAONE 4.5 achieved an average score of 77.3 across five key STEM benchmarks, and K-EXAONE ranked 7th worldwide among open-weight models on the Artificial Analysis Intelligence Index.[3][15] For KAPEX, the EXAONE VLM functions as a "robot brain" that enables vision-language-action reasoning: the model perceives the environment through cameras and sensors, understands natural language commands, and translates this understanding into physical actions.
KAPEX features full bipedal locomotion, allowing it to walk autonomously, navigate complex environments, avoid obstacles, climb stairs, and recover from falls. The robot's walking capabilities are powered by reinforcement learning combined with VLM-based augmented AI, enabling it to perceive terrain and adapt its gait in real time.[1][2] This contrasts with LG's CLOiD robot, which uses a wheeled base and is limited to flat indoor surfaces.
The bipedal design allows KAPEX to operate in environments not accessible to wheeled robots, including multi-story buildings without elevators, uneven factory floors, outdoor logistics yards, and residential settings with stairs.
One of KAPEX's most distinctive features is its multi-finger robotic hands with tactile sensing described as comparable in delicacy to human hands.[1][2] Each hand features five individually actuated fingers designed for fine manipulation tasks such as sorting objects, operating tools, handling fragile items, and performing assembly operations.
The tactile sensing system provides real-time feedback on contact force, surface texture, and grip stability, allowing KAPEX to adjust its grasp dynamically. This capability is critical for applications in healthcare (handling medical instruments), manufacturing (assembly of small components), and household settings (manipulating everyday objects without damage).
A key innovation emphasized by the KAPEX development team is the use of high-output full-body actuators developed domestically in South Korea, enhancing the country's technological self-sufficiency in robotics.[1] LG Electronics has developed the AXIUM actuator line, which integrates a motor, drive control, and speed/torque reducer into compact joint modules. These actuators leverage LG's existing manufacturing infrastructure, which produces approximately 45 million appliance motors annually.[16][17]
Actuators represent an estimated 40 to 60 percent of a humanoid robot's total production cost, making them the single largest component expense. LG's ability to manufacture these components at scale, using technology adapted from its home appliance motor production, provides a potential cost advantage over competitors who must source actuators from third parties.[16]
LG CEO Lyu Jae-cheol has stated that LG plans to begin mass production of the AXIUM actuator line by the end of 2026, positioning that year as the inaugural year of its humanoid robotics business.[17]
Many of KAPEX's detailed technical specifications have not been officially published by LG or KIST as of early 2026. The following table compiles available data from official announcements and third-party specification databases. Specifications marked with an asterisk (*) are sourced from community databases and have not been independently confirmed by the developers.
| Category | Specification | Value |
|---|---|---|
| Physical | Height | ~175 cm* |
| Physical | Weight | ~65 kg* |
| Physical | Material | Aluminum / high-strength alloy* |
| Mobility | Locomotion | Bipedal (autonomous walking) |
| Mobility | Total degrees of freedom | 40-50 (reported range) |
| Mobility | DOF per hand | 10* |
| Mobility | Walking speed | ~0.97 m/s (~3.5 km/h)* |
| Mobility | Capabilities | Obstacle avoidance, stair climbing, standing recovery |
| Manipulation | Fingers per hand | 5 |
| Manipulation | Hand type | Multi-finger with tactile sensing |
| Manipulation | Arm payload | ~7.5 kg* |
| Power | Battery life | ~3 hours* |
| AI | Cognitive engine | EXAONE Vision Language Model |
| AI | Learning methods | Reinforcement learning, VLM-based augmented AI |
| AI | LLM integration | Yes |
| Sensors | Vision system | Cameras with environmental perception |
| Sensors | Tactile sensors | Integrated in hands |
| Sensors | Depth sensors | Yes* |
| Connectivity | Interfaces | Ethernet, Wi-Fi* |
KAPEX is a central element of LG Group's broader "One LG" strategy for humanoid robotics. Rather than operating as a standalone product, KAPEX draws on components and technologies from across the LG conglomerate. This approach mirrors strategies LG has deployed in the automotive and AI data center sectors, where multiple affiliates contribute specialized subsystems as integrated packages.[16]
| LG affiliate | Role in humanoid robotics | Timeline |
|---|---|---|
| LG Electronics | AXIUM actuators; CLOiD and CLOi robots; integration platform | Mass production by end of 2026 |
| LG AI Research | EXAONE vision-language models as cognitive layer for KAPEX | EXAONE 4.5 open-weight release H1 2026 |
| LG Innotek | Composite sensing modules (cameras, LiDAR, radar); supplying Boston Dynamics and Figure AI | Large-scale production 2027-2028 |
| LG Energy Solution | Sulfide-based all-solid-state battery cells; NCMA cylindrical cells for sustained and burst output | Anode-free robot cells by 2030 |
| LG Display | 7-inch flexible OLED panels for humanoid interfaces (adapted from automotive dashboards) | Demonstrated 2025 |
| LG Chem | Advanced materials for lightweight structural components | Ongoing R&D |
LG Innotek is already in early-stage production of sensing modules for external clients including Boston Dynamics and Figure AI, with full-scale production anticipated in 2027-2028. LG Innotek CEO Moon Hyuk-soo has acknowledged that "meaningful robotics revenue is still three to four years away."[16]
LG Energy Solution is developing two tracks of battery technology for humanoid applications: graphite-anode cells for electric vehicles by 2029, and anode-free solid-state cells optimized for robots by 2030. These anode-free cells prioritize energy density per unit volume, which is critical for fitting power systems into the torso of a human-shaped robot. The company is in discussions with six or more global robotics firms as potential battery customers.[16]
LG also operates the Paju AI Data Center under construction in Gyeonggi Province, with 200-megawatt capacity accommodating up to 120,000 GPUs and a completion target of 2027. This facility will support the training and development of EXAONE models for KAPEX and other AI applications.[3]
KAPEX is designed for deployment across multiple sectors:
Manufacturing and logistics: Factory floor operations including parts handling, assembly assistance, quality inspection, and material transport. The bipedal platform can navigate uneven industrial surfaces and multi-level facilities that wheeled robots cannot access.[1]
Healthcare: Assisting with patient handling, delivering supplies, operating medical equipment, and performing repetitive tasks in clinical environments. The tactile hands are designed to be gentle enough for direct patient interaction.[1]
Household: Performing domestic tasks such as cleaning, organizing, and operating home appliances. While LG's CLOiD addresses this market with a wheeled platform, KAPEX's bipedal design could eventually extend home robotics to multi-story residences and outdoor environments.
Research: Serving as a development platform for academic and corporate research into humanoid locomotion, manipulation, and AI. KIST's Center for Humanoid Research uses KAPEX-related technologies for ongoing studies in autonomous manipulation and robot vision.[9]
KAPEX enters a rapidly growing global humanoid robot market with established players in the United States and China. The following table compares KAPEX with selected competitors:
| Robot | Developer | Country | Status (early 2026) | Key differentiator |
|---|---|---|---|---|
| KAPEX | LG / KIST | South Korea | Prototype; field demos planned 2026 | EXAONE VLM brain; national government backing |
| Optimus (Gen 3) | Tesla | United States | Production expected 2026-2027 | Vertical integration; Tesla manufacturing scale |
| Figure 02 | Figure AI | United States | Deployed at BMW factory | OpenAI partnership; factory deployment |
| Atlas (Electric) | Boston Dynamics | United States | Production version launched CES 2026 | 30+ years of locomotion R&D; Hyundai backing |
| G1 / H1 | Unitree Robotics | China | Commercially available | Low price point; high production volume |
| A2 | AgiBot | China | Volume production (5,168 units in 2025) | Largest production volume globally |
| RB-Y1 | Rainbow Robotics | South Korea | Available for research | HUBO heritage; 24 DOF; Samsung investment |
| CLOiD | LG Electronics | South Korea | Prototype; CES 2026 debut | Wheeled base; home-focused; ThinQ integration |
KAPEX's primary differentiation lies in three areas. First, it is backed by a comprehensive national government strategy with dedicated funding, infrastructure, and testing programs through the K-Humanoid Alliance. Second, the "One LG" supply chain approach means that actuators, batteries, sensors, AI models, and displays can all be sourced from affiliated companies within the LG Group, potentially reducing integration complexity and cost. Third, the EXAONE VLM provides a domestically developed AI foundation that does not depend on foreign model providers such as OpenAI or Google.[1][16]
However, KAPEX faces significant challenges. Chinese manufacturers have already achieved mass production at price points far below KAPEX's anticipated cost. Tesla and Figure AI benefit from established factory deployment experience. Boston Dynamics, now owned by Hyundai (also a Korean conglomerate), has over three decades of locomotion research. KAPEX's detailed specifications remain largely unpublished, making it difficult to compare performance metrics directly with competitors that have published extensive technical data.[13]
KAPEX exists within a broader South Korean robotics ecosystem that includes several notable humanoid and robotics programs:
| Project/Company | Description | Connection to KAPEX |
|---|---|---|
| K-Humanoid Alliance | Government-led consortium of 40+ organizations | KAPEX is a flagship project; LG is a core member |
| Rainbow Robotics | KAIST spin-off; developed RB-Y1 dual-arm robot | Fellow K-Humanoid Alliance member |
| Hyundai / Boston Dynamics | Acquired Boston Dynamics in 2021; Electric Atlas | Separate Korean-backed humanoid program |
| Samsung | Invested in Rainbow Robotics; developing Ballie companion robot | Samsung SDI provides batteries to alliance |
| KAIST | Developed HUBO and Pibot (autonomous piloting humanoid) | Academic research partner in K-Humanoid Alliance |
| KIST | Developed Mahru series; co-developer of KAPEX | Direct KAPEX development partner |
South Korea's approach is distinctive in that it combines government-directed industrial policy with conglomerate-scale manufacturing. The K-Humanoid Alliance model resembles the public-private partnerships that drove South Korea's success in semiconductors, shipbuilding, and consumer electronics in previous decades. Twenty major domestic universities participate in the alliance to develop talent pipelines for the humanoid robotics workforce.[4][5]
| Date | Milestone |
|---|---|
| April 10, 2025 | South Korea launches K-Humanoid Alliance; $150 million allocated for 2025 |
| October 1, 2025 | KIST announces co-development of KAPEX with LG Electronics and LG AI Research |
| November 2025 | KAPEX publicly unveiled; initial demonstrations of mobility and hand manipulation |
| January 2026 | LG debuts CLOiD home robot at CES 2026; unveils AXIUM actuator brand |
| March 2026 | LG AI Research announces EXAONE 4.5 VLM at Mobile World Congress 2026 |
| 2026 (planned) | KAPEX field demonstrations in factories, logistics centers, and public environments |
| End of 2026 (planned) | Mass production of LG AXIUM actuators begins |
| 2027-2028 (planned) | LG Innotek large-scale sensor module production for robotics industry |
| 2028 (target) | K-Humanoid Alliance foundation AI model for humanoid robots completed |
| 2029 (target) | Mass production of at least 1,000 humanoid robots annually; KAPEX full commercialization |
| 2030 (target) | LG Energy Solution anode-free solid-state battery cells for robots |